Saw-collar-truing machine.



No, '14a-,363. PAIBNTBD Nov. 3, 190s.

v R. o. WIGLEY.

SAW GoLLAR TRUING MACHINE. l

APPLICATION FILED JUNE 26,1903.

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Patented November 3, 1903.

PATENT OFFICE..

ROBERT OSCAR WIGLEY, OF BREWTON, ALABAMA.

SAW-COLLAR-TRUINGv MACHINE.

SIEECIFICATION forming part of LettersPateilt No. 743,363, dated November 3, 1903. applicati@ tied rune 26,1903. seriaiNo. 133,231. (Nomaden To all whom, it 17m/y concer/t: l

Beit known thatI, ROBERT OSCAR WIG- LEY, a citizen of the United States, and a resident of Brewton, in the county of Escambia and State of Alabama, have made certain new and useful Improvements in Saw-Oollar-TruingMachines, of which the followingisaspecication.

The collars which clamp and hold the cir-A io cular saw upon the mandrel or arbor some-` times get out of true, being worn so by the imperceptible movement ofthe saw in action.

When so worn, a very slight variation at the center of the sawmill when multiplied by the t5 distance from the center to the circle of teeth gives an irregular motion to the saw, and it is then necessary toturn off these collars to a true plane again. This is usually done by hand; but it is unsatisfactory and uncertain,

2o as a tool heldin the hand will of itself follow the irregularities of the collar.`

My invention provides a simple and inex`` pensive machine specially designed as an attachment to the sawmill husk or frame by z5 which the work of truing the collars is conveniently, expeditiously, and accurately effected. l

Figure l is a perspective view of the machine froin the inside. Fig. 2 is an outer side 3o view; and Fig. 3 is a plan view 0E a machine, on a reduced scale, showing it applied to the sawmill husk or frame when being used;

In Fig. 3 of the drawings, A represents the sawmill husk or frame, upon which in bearings D D is journaled thesaw-mandrel B, which carries a band-pulley C, by which it is driven. On the end of the saw-mandrel is arranged one of the collars c, which is one of a pair which clamps the circular-saw blade be- 4o tween them, the other collar or washer being.

taken olf, as is necessary when the collars are being trued. This other collar, which. is in the nature of a washer, tits onto the reduced and screw-threaded end d of the mandrel and is secured by a nut in the well-known way.

My machine attachment is designed to true the adjacent faces of the collars, and the parts of my device are indicated by numerals and are shown on a large scale in Figs. 1 and 2.

1 is a rectangular 'frame composed of two side arms and a front piece, with flat and slotted plate extensions 2 at the ends of the side arms, which plate extensions are adapted to receive bolts that pass through the sawmill-frame to connect the attachment thereto, the two side arms being disposed at equal distance from and on opposite sides of the saw-mandrel.

The front piece of the frame l is slotted transversely in the middle in vertical direction at 1S and carries a vertically-adjustable slide 8 on the inner side, through which is tapped a center screw 4, the shank of the screw passing through the vertical slot 18 of the front piece of the frame. 'This center screw is designed to enter a little center recess formed in the end of the saw-mandrel andV holds the frame 1 in true stationary position in relation to the screw-mandrel, as seen in Fig. 3, the mandrel turning against the end of the center screw.

In the front piece of the frame 1 there is formed on each side of the center screw a longitudinal slot 17, disposed horizontally, and on the inner sides of these slots are formed or attached dovetail or undercut guides 12, upon which slides horizontally the tool-carrier5. Thiscarrierhas an opening 10,through which the turning-tool 11 projects into engagement with the collar to be turned, as seen in4 Fig. 3.

The carrier 5 slides horizontally upon the dovetail guides 12 and is adjusted thereon by the feed-screw 6, which is tapped in one of the side arms of the frame l and is swiveled at its inner end in the tool-carrier, so that by turning the screw the tool is carried in and. out across the face of the collar being turned. The tool 1l is clamped in thetool-carrier by a vertical set-screw 7, tapped in the carrier and bearing upon the tool. The tool-carrier and tool are also tightened vertically, and for this purpose the tool-carrier is made with a separate block 13, Fig. 1, at its upper end and with alange 14 overlapping the block, and a setscrew `15 is tapped through the flange and against the block, so as to tighten the tool against vertical movement. To hold this block in its vertical movement, it' is formed with guide-pins 16 16, that protrude into slots 17 17 in the carrier.

When the tool is clamped in the carrier with the cutting edge in position against the collar c and the feed-screw 6 is turned, it will ICO be seen that the rotary mot-ion ofi-the sawmandrel causes the collar to rotate and be turned true by the action of the tool.

To turn the outside collar or Washer of the mandrel, which is not shown, said collar or Washer is merely reversed and put back` on the mandrel, so that it faces outwardly and is then tightly clamped in this position by the mandrel-nut while being trued.

' By means of the vertical adjustment of the center screw 4 it can be adjusted so as to exactly strike the center of the mandrel.

As shown, I have arranged two horizontal guides and slots in the middle part of the frame, one on each side of the center screw, into either of which the tool-carrier may be adjusted by loosening its tightening-block. There are also in the side arms separate holes for the feed-screw 6 to permit this change.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A saw-collar-truing machine, comprising a rectangular frame having two side arms with fastening devices at the free ends thereof for attachment to the saw-frame, a front cross-piece connecting these arms and having a vertical transverse slot inthe middle with 'an adjustable center screw therein, and having also a horizontal guide for a tool-carrier, a tool-carrier and tool adjustable thereon, means for clamping the tool and means for feeding the carrier, substantially as shown and described.

2. A saW-collar-truing machine, comprising a rectangular frame having two side arms with fastening devices at the ends, a front cross-piece connecting these arms and having undercut guides on its inner face and a vertical transverse slot in the middle with an adjustable slide and center screw working therein, a flanged tool-carrier made horizontally adjustable along the front piece ot' the frame upon the undercut guides and provided with a feed-screw, a turning-tool arranged therein and provided with a set-screw, and a separate tightening-block arranged within the flange of the tool-carrier and a setscrew tapped through the flange and binding against the block for holding the carrier against vertical movement, substantially as described.

ROBERT OSCAR WIGLEY.

Witnesses:

W. H. HARPER, R. A. BELL. 

